Intermittent wiper control

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dussgirl

New Member

• Apr 16, 2013

• #1

I need help with a intermittent wiper control schematic. The motors for the wipers are 115V. The wipers have to have the capability of being fully on, and with a 1 second, 2 second, and 4 second delay along with a park position. I am aware of the 555 timer but i am not sure how to integrate it along with calculations to select the componets etc.

 

alec_t

Well-Known Member

Most Helpful Member

• Apr 16, 2013

• #2

Do the wipers have limit switches so that they self-park when switched off?
Is the 115V AC or DC?
What is the stall current of the motors?
How many motors?

 

D

dussgirl

New Member

• Apr 16, 2013

• #3

Yes they have a self park when switched off. They are AC motors 115V single phase. FL current at 60 hz is 2.4 A. There are a total of 4 motors,

 

Last edited: Apr 16, 2013

alec_t

Well-Known Member

Most Helpful Member

• Apr 17, 2013

• #4

Will all four motors operate together in synchronism, or will they be independently controlled?
Can you post a schematic showing any control switching and supplies that they already have?

 

Last edited: Apr 17, 2013

F

Frank Nash

New Member

• Apr 17, 2013

• #5

dussgirl said:

The wipers have to have the capability of being fully on, and with a 1 second, 2 second, and 4 second delay.

Click to expand...

Sorry I don't understand. Delay? Do you wish them to wipe once per time period? Or wipe at regular speed for the time periods and then shut off?

 

D

dussgirl

New Member

• Apr 17, 2013

• #6

No. 4 modes. Fully on every 1 sec every 2 sec and every 4 sec. All four motors are controlled individually. There is nothing special about the switches. They are discrete momentary switches

 

alec_t

Well-Known Member

Most Helpful Member

• Apr 18, 2013

• #7

Are the present switches wired to a mains supply or a mains-isolated supply?

 

F

Frank Nash

New Member

• Apr 18, 2013

• #8

Take a look at Forrest Mims's Circuit Scrapbook, page 17 on Google books.

https://books.google.com/books?id=-sE7JVywygQC&pg=PA17

Combinations of resistance and capacitance on the gate of a MOSFET cause it to act like a time delay cut off switch. The MOSFET can energize a relay(s) to control the wiper motors. Three different R/C combinations and one full on.

 

alec_t

Well-Known Member

Most Helpful Member

• Apr 18, 2013

• #9

Something based on this, perhaps?

View attachment WiperControl.asc